Sliding-door lock.



UNITED STATES r iatented September 29, 1903.

PATENT OFFICE.

SLIDING-Deon Lock.

SPECIFICATION forming part of Letters Patent No. 739,903, dated September 29,1903. i

V Appiictnon inea December 26,1902'. serian. 136,682.' cromati.)

` citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Sliding-Door Locks, of which the following is a full, clear, and exact deseription, reference being had to the accompanying drawings, forming part of this speci-` iication. v

My invention relates to a lock for sliding doors in which provision is made for movement of the lock-catch in a manner to throw it into perfect engagement withgpthe keeper carried by a sliding door mating with that by which the lock is carried or ,by a door-jamb to which the lock-carrying sliding door is moved. My construction also provides vfor the retention of the catch after it has been placed in locking engagement with its receiving-keeper, thereby securely holding it from disengagement with the keeper.

The invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a face view of one side of the eX- terior of my lock applied to a door. Fig. II is a vertical section taken through a pair of doors or a door and jamb, the lock mechanism interior of its casing being shown in elevation. Fig. III is a vertical crosssection taken on line III III, Fig. II. Fig. IV is a horizontal section taken on line IV IV, Fig. II. Fig. V

is a perspective view of the lock-catch andy the bolt by which it is carried. Fig. VI is a perspective view of the catch-lifting trigger. Fig. VII is a perspective view of the rear end of the catch-bolt-supporting guide. Fig. VIII is a perspective view of the throw-plate and ribs by which the catch-bolt and catch are operated.

A designates a door in which my lock is seated, and A is a second door mating with the door A or a door-jamb to which the door A is moved. l n

1 designatesa `keeper fitted to the door or jamb A and provided with a catch-receiving orifice 2.

' 3v designates an edge'face-plate fitted to the door A and provided with a catch-orifice 4.

5 designates side tace-plates secured to each side of the door A to inclose the lock seated between them. These face-plates are provided with elongated openin gs 6 andkeyholes 7. Back of each face-plate at the locations of the openings 6 are recessedy slides 8, which are laterally movable with respect to the side face-plates and vare held forY ltheir sliding movement by lugs 9. (See Fig. III.) I

10 designates a lock-casing set into the door A'between the face-plates and provided with keyholes 7, that register with the keyholes .7 in the side face-plates. v

11 is an upper guide-rib, and 12 is a lower guide-rib, both of which are within the casing 10. l Y

, 13 is a notch in the guide-rib 12, to which `more particular reference will hereinafterbe made.-`

14 is a guide fixed to the casing 10 and located slightly above the guide-rib 12 to furnish a space between the two members. This guide 14 bears at its upper side forward of its rear end a shoulder 15 and is provided at the rear of saidshoulder with a socket 16, having an incline at its rear side.

17 designates slidable throw-plates seated in openings 18 in the side walls of the casing 10, (see Figs. II and IV,) and 19 and 2O are slidelribs carried by said throw-plates, the former of Awhich is movably situated between the lower xed guide-rib 12 and guide 14, while the latter rests movably on the upper ixed 21 is a socket in the slide-rib 20, that ,receives interlocking engagement with a member to be hereinafter mentioned.

22 designates holes extending through the throw-plates 17 and the slide-ribs 19 and20 and which receive pins 8, that are carried by the slides'S ateach side. of the lock' for'the lpurpose of connecting the throw-plates and 24, adapted for movement to the shoulder l5 on said guide. At the rear end of said bolt is a downturned tongue 25, adapted for movement into and out of the socket 16 in the guide 14.

26 is a spring fixed to the casing 10 and having its free end resting upon the bolt 23.

27 is a catch of hook form connected to the bolt 23 by a pivot-pin 28. The catch 27 extends through the orifice t in the edge faceplate 3 of the lock and is adapted to be projected through the orifice 2 in the keeper l when the door is locked, as seen in Figs. II and IV.

29 is a spring by which the catch 27 is normally depressed and which is situated between the top side of the catch and an arm 30, carried by one of the throw-plates 17.

31 is a notched bracket carried by the throwplate 17, which carries the arm 30.

2 is a lift-trigger mounted at its rear end upon the pivot-pin 28, that connects the catch 27 to its bolt 23. This trigger' is provided at its rear end with a lug 33, that engages inthe notch of the bracket 3l. At the forward end of the trigger is an arm 3ft, that extends bencath the catch 27, as seen in Fig. VI.

35 is a notched retaining-bolt located in the upper part of the lock-casing 10 and arranged in guides at right angles to the upper sliderib 20. This retaining-bolt is adapted to receive the engagement of a key 36, introduced through the keyholes 7 and 7L in the faceplates and lock-casing, by which the bolt is thrown into the socket 21 in said slide-rib when the catch 27 is in projected position and engaged with the keeper 1, to which it is moved.

37 designates turn buttons extending, through the slides 8, into the lock-casing 10 beneath the lower fixed guide-rib 12. On the stem of each turn-button, within said lockcasing, is a finger 38, adapted to enter the notch 13 in said guide-rib when rocked in an upwardly direction and which when positioned in said notch serves to hold the slides 8 from lateral movement to actuate the throwplate 17, thereby preventing actuation of th catch 27 after it has been locked.

The operation to actuate the catch 27 may be stated as follows: Assuming the latch to be engaged with its receiving-keeper, upon rearward movement of either of the slides 8 the throw-plates 17 and their slide-ribs 19 and 20 are shifted rearwardly. In this action the catch-carrying bolt 23 is held depressed by the spring 26 to ride on the guide 14, and as it starts to move thereon snfticient friction is occasioned by the bearing of the tongue 25 in the socket 16 to slightly retard the movement of the bolt. The result is that the throwplates and their ribs move a short distance without moving the bolt 23, and thereby rock ment of either of the slides 8 again` projects `the. catch, so that it may engage the keeper 1.

In the lower part of the lock-casing 10 I have shown a trip-handle mechanism, such asis used in sliding-door locks, but for which no invention is herein claimed and of which, in view thereof,detailed description is deemed unnecessary.

1. In a sliding-door lock, the combination of a throw-plate, a sldable bolt, a catch pivoted to said bolt, and means connecting said catch to said throw-plate, substantially as and for the purpose set forth.

2. In a slidingdoor lock, the combination of a throw-plate, a slidable bolt, a catch pivoted to said bolt, and a trigger pivoted to said bolt and having engagement with said throwplate and said catch, substantially as set forth.

3. In a sliding-door lock, the combination of a throw-plate, a slidable bolt, a springpressed catch pivoted to said bolt, and a trigger pivoted to said bolt and having engagement with said throw-plate and said catch, substantially as set forth.

t. In a sliding-door lock, the combination of a throw-plate, a slidable bolt, means for retarding said bolt at a period of its movement, a catch pivoted to said bolt, and a trigger pivoted to said bolt and having engagement with said throw-plate and said catch, substantially as set forth.

5. In a sliding-door lock, the combination of a throw-plate, a slidable bolt, a guide containing a socket on which said bolt is mounted, a spring pressing upon said bolt to cause it to .engage in the socket in said guide, acatch pivoted to said bolt, and a trigger pivoted to said bolt and having engagement with said throw-plate and said catch, substantially as set forth.

6. In a sliding-door lock, the combination of a throw-plate, a slidable bolt provided with a tongue, a bolt-supporting guide provided with a socket adapted to receive said tongue, a spring resting upon said bolt, a springpressed catch pivoted to said bolt, and a trigger pivoted to said bolt and having engagement with said throw-plate and said catch, substantially as set forth.

7. In a sliding-door lock, the combination of a throw-plate, guide-ribs, ribs carried by said throw-plate riding on said guide-ribs, a slidable bolt, a spring-pressed catch pivoted IOO TIO

oted to said bolt, a trigger-pivoted to said bolt and havng engagement with said throw-plate and said catch, a notched rib adjacent to said I5 throw-plate, and a turn-button having a finger to enter the -notch in said rib for the purpose of preventing movement of said throwplate, substantially as set forth.

EDWARD MCKEAN.`

In presence of- A. V. ALEXANDER, E. S. KNIGHT.

to said bolt, and a trigger pivoted to said bolt and having engagement With said throw-plate and said catch, substantially as set forth.

8. In a sliding-door lock, the combination 5 of a throw-plate, a rib carried by said plate,

a slidablc bolt, a catch pivoted to said slidable bolt, a trigger pivoted to said bolt and having engagement with said throw-plate and said catch, and a retaining-bolt to engage said 1 Io throw-plate, substantially as set forth.

9. In a sliding-door lock, the combination of a throw-plate, a slidable bolt, a catch piv- 

